Scientific Papers

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Unexpected Positive Buoyancy in Deep Sea Sharks, Hexanchus griseus, and a Echinorhinus cookei

Unexpected Positive Buoyancy in Deep Sea Sharks, Hexanchus griseus, and a Echinorhinus cookei

Published on 10. June 2015 Unexpected Positive Buoyancy in Deep Sea Sharks, Hexanchus griseus, and a Echinorhinus cookei Itsumi Nakamura, Carl G. Meyer, Katsufumi Sato ABSTRACT: We do not expect non air-breathing aquatic animals to exhibit positive buoyancy. Sharks, for example, rely on oil-filled livers instead of gas-filled swim bladders to increase their buoyancy,...

Ontogeny of digestive organs during early developmental stages of the tropical whitespotted bamboo shark

Ontogeny of digestive organs during early developmental stages of the tropical whitespotted bamboo shark

Published online on 09. June 2015 Ontogeny of digestive organs during early developmental stages of the tropical whitespotted bamboo shark, Chiloscyllium plagiosum – a histological study Xiaojin Xu, Yingxue Qin, Gang Luo, Xi Huang, Wen-zheng Zou, Lipin Zheng, Jun Wang, Yongquan Su ABSTRACT: This study was undertaken to address a lack of understanding of the

Drivers of Daily Routines in Blacktip Reef Sharks: Hunt Warm, Rest Warmer?

Drivers of Daily Routines in Blacktip Reef Sharks: Hunt Warm, Rest Warmer?

Published on 10. June 2015 Drivers of Daily Routines in an Ectothermic Marine Predator: Hunt Warm, Rest Warmer? Yannis P. Papastamatiou, Yuuki Y. Watanabe, Darcy Bradley, Laura E. Dee, Kevin Weng, Christopher G. Lowe, Jennifer E. Caselle ABSTRACT : Animal daily routines represent a compromise between maximizing foraging success and optimizing physiological performance, while...

Repeated, long-distance migrations by a philopatric predator targeting highly contrasting ecosystems

Repeated, long-distance migrations by a philopatric predator targeting highly contrasting ecosystems

Published on 09. June 2015 Repeated, long-distance migrations by a philopatric predator targeting highly contrasting ecosystems James S. E. Lea, Bradley M. Wetherbee, Nuno Queiroz, Neil Burnie, Choy Aming, Lara L. Sousa, Gonzalo R. Mucientes, Nicolas E. Humphries, Guy M. Harvey, David W. Sims, Mahmood S. Shivji ABSTRACT: Long-distance movements of animals are an...

Population Genetics and Relatedness of the Broadnose Sevengill Shark in Two Northeast Pacific Estuaries

Population Genetics and Relatedness of the Broadnose Sevengill Shark in Two Northeast Pacific Estuaries

Published on 08. June 2015 Preliminary Observations of Population Genetics and Relatedness of the Broadnose Sevengill Shark, Notorynchus cepedianus, in Two Northeast Pacific Estuaries Shawn Larson, Debbie Farrer, Dayv Lowry, David A. Ebert ABSTRACT: The broadnose sevengill shark, Notorynchus cepedianus, a common coastal species in the eastern North Pacific, was sampled during routine capture...

A Gigantic Shark from the Lower Cretaceous Duck Creek Formation of Texas

A Gigantic Shark from the Lower Cretaceous Duck Creek Formation of Texas

Published on 03. June 2015 A Gigantic Shark from the Lower Cretaceous Duck Creek Formation of Texas Joseph A. Frederickson , Scott N. Schaefer, Janessa A. Doucette-Frederickson ABSTRACT: Three large lamniform shark vertebrae are described from the Lower Cretaceous of Texas. We interpret these fossils as belonging to a single individual with a calculated...

Mitochondrial Genetic Structure and Matrilineal Origin of White Sharks in the Northeastern Pacific

Mitochondrial Genetic Structure and Matrilineal Origin of White Sharks in the Northeastern Pacific

Published online on 01. June 2015 Mitochondrial Genetic Structure and Matrilineal Origin of White Sharks, Carcharodon carcharias, in the Northeastern Pacific: Implications for Their Conservation Erick C. Oñate-González, Axayácatl Rocha-Olivares, Nancy C. Saavedra-Sotelo, Oscar Sosa-Nishizaki ABSTRACT: White sharks (Carcharodon carcharias, WS henceforth) are globally and regionally threatened. Understanding their patterns of abundance and connectivity, as

Organochlorine contaminants and maternal offloading in the lecithotrophic Pacific angel shark

Organochlorine contaminants and maternal offloading in the lecithotrophic Pacific angel shark

Published online on 15. May 2015 Organochlorine contaminants and maternal offloading in the lecithotrophic Pacific angel shark (Squatina californica) collected from southern California Kady Lyons, Christopher G. Lowe ABSTRACT: Pacific angel sharks (Squatina californica) are a benthic elasmobranch that occupy intermediate trophic level positions in coastal food webs. Angel sharks’ life history characteristics make...

A Study of Shark Stealth Behavior in the Proximity of Divers

A Study of Shark Stealth Behavior in the Proximity of Divers

Published on 04. May 2015 A Study of Shark Stealth Behavior in the Proximity of Divers Erich Ritter, Raid Amin ABSTRACT: This study examines the approach patterns of sharks in the vicinity of human divers, focusing on the diver’s body orientation and a shark’s distance from the sea bed when approaching the diver. A...

Polybrominated diphenyl ethers in thirteen shark species from offshore and coastal waters of Korea

Polybrominated diphenyl ethers in thirteen shark species from offshore and coastal waters of Korea

Published online on 29. April 2015 Polybrominated diphenyl ethers in thirteen shark species from offshore and coastal waters of Korea Hyun-Kyung Lee, Sang-Jo Kim, Yunsun Jeong, Sunggyu Lee, Woochang Jeong, Won-Chan Lee, Eun-Jung Choy, Chang-Keun Kang, Hyo-Bang Moon ABSTRACT: Limited reports are available on polybrominated diphenyl ethers (PBDEs) in sharks. In this study, PBDEs...

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